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ScalableLux

Name: ScalableLux
Author: ishland

A Fabric mod based on Starlight that improves the performance of light updates in Minecraft.

Why does this fork exist?

Starlight is no longer maintained as a mod since Mar 8, 2024.
The performance of vanilla lighting engine is still a bottleneck for high-performance chunk generation.
The base Starlight is still 100% faster than vanilla, allowing the chunk system to scale beyond 24 threads.
Starlight's "stateless" design allows for parallel light updates, further widening the performance gap. It is still rather important for dedicated servers with more players to stress chunk generation. Therefore, it is still important for Fabric or other modded servers with plenty of players.

What does this fork do?

Contains all the performance improvements from Starlight with additional bug fixes.
Optionally allows for parallel light updates, bringing significant performance improvement in high-speed world generation and heavy light updates scenarios.

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Name	Game version	Platforms	Published	Downloads	Actions
A 0.3.0-alpha.0.6 devbuild for fabric 26.3	26.3	Fabric	3d ago	1	Download Open in new tab Copy link Report
A 0.3.0-alpha.0.17 devbuild for neoforge 26.3	26.3	Neoforge	3d ago	1	Download Open in new tab Copy link Report
A 0.3.0-alpha.0.4 devbuild for fabric 26.3-rc-2	26.3.x	Fabric	3d ago	1	Download Open in new tab Copy link Report
A 0.3.0-alpha.0.8 devbuild for neoforge 1.21.1	1.21.1	Neoforge	3d ago	1	Download Open in new tab Copy link Report
A 0.3.0-alpha.0.7 devbuild for fabric 1.21.1	1.21.1	Fabric	3d ago	1	Download Open in new tab Copy link Report
A 0.3.0-alpha.0.6 devbuild for neoforge 1.21.1	1.21.1	Neoforge	3d ago	1	Download Open in new tab Copy link Report
A 0.3.0-alpha.0.5 devbuild for fabric 1.21.1	1.21.1	Fabric	3d ago	1	Download Open in new tab Copy link Report
A 0.3.0-alpha.0.18 devbuild for neoforge 26.1.2	26.1.2	Neoforge	3d ago	1	Download Open in new tab Copy link Report
A 0.3.0-alpha.0.3 devbuild for fabric 1.21.11	1.21.11	Fabric	3d ago	1	Download Open in new tab Copy link Report
A 0.3.0-alpha.0.17 devbuild for neoforge 26.1.2	26.1.2	Neoforge	3d ago	1	Download Open in new tab Copy link Report
A 0.3.0-alpha.0.2 devbuild for fabric 26.1.2	26.1.2	Fabric	3d ago	1	Download Open in new tab Copy link Report
A 0.3.0-alpha.0.16 devbuild for neoforge 26.2	26.2	Neoforge	3d ago	1	Download Open in new tab Copy link Report
A 0.3.0-alpha.0.3 devbuild for fabric 26.2	26.2	Fabric	3d ago	1	Download Open in new tab Copy link Report
A 0.3.0-alpha.0.16 devbuild for neoforge 26.1.2	26.1.2	Neoforge	3d ago	1	Download Open in new tab Copy link Report
A 0.3.0-alpha.0.1 devbuild for fabric 26.1.2	26.1.2	Fabric	3d ago	1	Download Open in new tab Copy link Report
A 0.3.0-alpha.0.15 devbuild for neoforge 26.2	26.2	Neoforge	3d ago	1	Download Open in new tab Copy link Report
A 0.3.0-alpha.0.2 devbuild for fabric 26.2	26.2	Fabric	3d ago	1	Download Open in new tab Copy link Report
A 0.3.0-alpha.0.2 devbuild for neoforge 26.2	26.2	Neoforge	3d ago	1	Download Open in new tab Copy link Report
A 0.3.0-alpha.0.0 devbuild for 26.2	26.2	Fabric	3d ago	1	Download Open in new tab Copy link Report
R 0.2.1+neoforge.729d9d3	26.2.x	Neoforge	3d ago	1	Download Open in new tab Copy link Report
R 0.2.1+fabric.2b08348	26.2.x	Fabric	3d ago	1	Download Open in new tab Copy link Report
R 0.2.0+neoforge.cd0897f	26.1.x	Neoforge	3d ago	1	Download Open in new tab Copy link Report
R 0.2.0+fabric.2b63825	26.1.x	Fabric	3d ago	1	Download Open in new tab Copy link Report
R 0.1.6+neoforge.d31dbcf	1.21.x	Neoforge	3d ago	1	Download Open in new tab Copy link Report
R 0.1.6+fabric.c25518a	1.21.x	Fabric	3d ago	1	Download Open in new tab Copy link Report
R 0.1.0.1+neoforge.1cb1e91	1.21.1	Neoforge	3d ago	1	Download Open in new tab Copy link Report
R 0.1.5.1+neoforge.f7c210f	1.21.8	Neoforge	3d ago	1	Download Open in new tab Copy link Report
R 0.1.0.1+fabric.d0d58ab	1.21.1	Fabric	3d ago	1	Download Open in new tab Copy link Report
R 0.1.2+fabric.87468e8	1.21.4	Fabric	3d ago	1	Download Open in new tab Copy link Report
R 0.1.3.1+fabric.ce1e005	1.21.5	Fabric	3d ago	1	Download Open in new tab Copy link Report
R 0.1.5.1+fabric.abdeefa	1.21.x	Fabric	3d ago	1	Download Open in new tab Copy link Report
R 0.1.5+neoforge.4c941f5	1.21.8	Neoforge	3d ago	1	Download Open in new tab Copy link Report
R 0.1.5+fabric.e4acdcb	1.21.x	Fabric	3d ago	1	Download Open in new tab Copy link Report
R ScalableLux 0.1.4+fabric.b88b7b4	1.21.x	Fabric	3d ago	1	Download Open in new tab Copy link Report
B 0.1.3+beta.1+neoforge.835ef64	1.21.5	Neoforge	3d ago	1	Download Open in new tab Copy link Report
B 0.1.3+beta.1+fabric.4039a8d	1.21.x	Fabric	3d ago	1	Download Open in new tab Copy link Report
B 0.1.0+beta.2+neoforge.1a07a27	1.21.1	Neoforge	3d ago	1	Download Open in new tab Copy link Report
B 0.1.0+beta.1+neoforge	1.21.1	Neoforge	3d ago	1	Download Open in new tab Copy link Report
B 0.1.2+beta.1+fabric.6d46f24	1.21.x	Fabric	3d ago	1	Download Open in new tab Copy link Report
R 0.1.1 for 1.21.3	1.21.x	Fabric	3d ago	1	Download Open in new tab Copy link Report
B 0.1.1+rc.2+fabric.3ed8e44	1.21.x	Fabric	3d ago	1	Download Open in new tab Copy link Report
B 0.1.1+rc.1+fabric.dac63da	1.21.x	Fabric	3d ago	1	Download Open in new tab Copy link Report
B 0.1.1+beta.4+fabric.9c7b699	1.21.x	Fabric	3d ago	1	Download Open in new tab Copy link Report
B 0.1.1+beta.3+fabric.30cf95d	1.21.x	Fabric	3d ago	1	Download Open in new tab Copy link Report
R 0.1.0+fabric.26c6e72	1.21.x	Fabric	3d ago	1	Download Open in new tab Copy link Report
B 0.1.0+rc.1	1.21.x	Fabric	3d ago	1	Download Open in new tab Copy link Report
B 0.1.0+beta.1	1.21	Fabric	3d ago	1	Download Open in new tab Copy link Report

[0.3.0-alpha.0.6+26.3] 0.3.0-alpha.0.6 devbuild for fabric 26.3 by ishland on Oct 08, 2026

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This version is uploaded automatically by GitHub Actions.

Changelog:

[9ee89981](https://github.com/RelativityMC/ScalableLux/commit/9ee899818a134115f8321dd61a723b4170273afc) build: 26.3 - ishland
[fa8b28b1](https://github.com/RelativityMC/ScalableLux/commit/fa8b28b1551a1ec9c23fa2d26233e61194c3314e) fix: archivesName - ishland

[0.3.0-alpha.0.17+26.3] 0.3.0-alpha.0.17 devbuild for neoforge 26.3 by ishland on Oct 08, 2026

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This version is uploaded automatically by GitHub Actions.

Changelog:
No changes detected.

[0.3.0-alpha.0.4+26.3-rc-2] 0.3.0-alpha.0.4 devbuild for fabric 26.3-rc-2 by ishland on Oct 08, 2026

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This version is uploaded automatically by GitHub Actions.

Changelog:

[d30d8fb2](https://github.com/RelativityMC/ScalableLux/commit/d30d8fb2874b6aa1d6693dc07b82e14b16b3fdf6) build: 26.3-rc-2 - ishland

[0.3.0-alpha.0.8+1.21.1] 0.3.0-alpha.0.8 devbuild for neoforge 1.21.1 by ishland on Oct 08, 2026

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This version is uploaded automatically by GitHub Actions.

Changelog:

[9ca40b0a](https://github.com/RelativityMC/ScalableLux/commit/9ca40b0a3002c8156547bb031539928ff8f34035) Updated Upstream - ishland

[0.3.0-alpha.0.7+1.21.1] 0.3.0-alpha.0.7 devbuild for fabric 1.21.1 by ishland on Oct 08, 2026

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This version is uploaded automatically by GitHub Actions.

Changelog:

[a1c3604d](https://github.com/RelativityMC/ScalableLux/commit/a1c3604df201a2dcde414da96062f678c9138b94) fix: correctly save light correct flag - ishland

[0.3.0-alpha.0.6+1.21.1] 0.3.0-alpha.0.6 devbuild for neoforge 1.21.1 by ishland on Oct 08, 2026

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This version is uploaded automatically by GitHub Actions.

Changelog:

[b95561e9](https://github.com/RelativityMC/ScalableLux/commit/b95561e94e7ab4e4cac0a0f3204406d9ae8a5329) ci: enable publishing - ishland

[0.3.0-alpha.0.5+1.21.1] 0.3.0-alpha.0.5 devbuild for fabric 1.21.1 by ishland on Oct 08, 2026

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This version is uploaded automatically by GitHub Actions.

Changelog:

[163c89aa](https://github.com/RelativityMC/ScalableLux/commit/163c89aaa2894e5b499c21d31e25d1e6c1fbea72) ci: enable publishing - ishland

[0.3.0-alpha.0.18+26.1.2] 0.3.0-alpha.0.18 devbuild for neoforge 26.1.2 by ishland on Oct 08, 2026

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This version is uploaded automatically by GitHub Actions.

Changelog:

[93842648](https://github.com/RelativityMC/ScalableLux/commit/93842648ef2a04b21496cda184b7dece0595b0db) fix: remove fmj from jar - ishland

[0.3.0-alpha.0.3+1.21.11] 0.3.0-alpha.0.3 devbuild for fabric 1.21.11 by ishland on Oct 08, 2026

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Changelog:

[876d045a](https://github.com/RelativityMC/ScalableLux/commit/876d045a6187fff8f013aaa679cb7708f8f38b0b) build: backport to 1.21.11 - ishland

[0.3.0-alpha.0.17+26.1.2] 0.3.0-alpha.0.17 devbuild for neoforge 26.1.2 by ishland on Oct 08, 2026

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This version is uploaded automatically by GitHub Actions.

Changelog:

[d463f53e](https://github.com/RelativityMC/ScalableLux/commit/d463f53e8e0d5aed06bfa576f135e115430e0d17) Updated Upstream - ishland

[0.3.0-alpha.0.2+26.1.2] 0.3.0-alpha.0.2 devbuild for fabric 26.1.2 by ishland on Oct 08, 2026

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This version is uploaded automatically by GitHub Actions.

Changelog:

[e41e4551](https://github.com/RelativityMC/ScalableLux/commit/e41e4551dba6685806b75739bda39859deb000d6) Updated Upstream - ishland

[0.3.0-alpha.0.16+26.2] 0.3.0-alpha.0.16 devbuild for neoforge 26.2 by ishland on Oct 08, 2026

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This version is uploaded automatically by GitHub Actions.

Changelog:

[e24f8a50](https://github.com/RelativityMC/ScalableLux/commit/e24f8a509e6b2ca0be5e342fc5d6733e9ae99c45) Updated Upstream - ishland

[0.3.0-alpha.0.3+26.2] 0.3.0-alpha.0.3 devbuild for fabric 26.2 by ishland on Oct 08, 2026

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This version is uploaded automatically by GitHub Actions.

Changelog:

[77c290c4](https://github.com/RelativityMC/ScalableLux/commit/77c290c4c84be1c87d006bc8221e5361d98e0c9a) fix: add compatibility shims for StarLightLightingProvider - ishland

[0.3.0-alpha.0.16+26.1.2] 0.3.0-alpha.0.16 devbuild for neoforge 26.1.2 by ishland on Oct 08, 2026

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This version is uploaded automatically by GitHub Actions.

Changelog:

[6a69c879](https://github.com/RelativityMC/ScalableLux/commit/6a69c87966040836d65dcc3e1ab9af4c98a8fd0a) build: rebase on backports/26.1.2 - ishland

[0.3.0-alpha.0.1+26.1.2] 0.3.0-alpha.0.1 devbuild for fabric 26.1.2 by ishland on Oct 08, 2026

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This version is uploaded automatically by GitHub Actions.

Changelog:

[e6a7c8a2](https://github.com/RelativityMC/ScalableLux/commit/e6a7c8a2ac0cabbce9774b5dd169e3bfe624ad43) Initial commit - ishland
[1a578f0b](https://github.com/RelativityMC/ScalableLux/commit/1a578f0b384462d072a66ed08482dfa9e506bd6e) fix: git versioning - ishland

[0.3.0-alpha.0.15+26.2] 0.3.0-alpha.0.15 devbuild for neoforge 26.2 by ishland on Oct 08, 2026

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This version is uploaded automatically by GitHub Actions.

Changelog:

[49989ca8](https://github.com/RelativityMC/ScalableLux/commit/49989ca8a84cfd7201bbfc480b3b86b1f96a725c) fix: git version numbers - ishland

[0.3.0-alpha.0.2+26.2] 0.3.0-alpha.0.2 devbuild for fabric 26.2 by ishland on Oct 08, 2026

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This version is uploaded automatically by GitHub Actions.

Changelog:

[036ac170](https://github.com/RelativityMC/ScalableLux/commit/036ac1700f5e88b4fc14fc63cdb759b9b64944ff) fix: handle cases where Level.getChunkSource return null - ishland

[0.3.0-alpha.0.2+26.2] 0.3.0-alpha.0.2 devbuild for neoforge 26.2 by ishland on Oct 08, 2026

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This version is uploaded automatically by GitHub Actions.

Changelog:

[53b78f42](https://github.com/RelativityMC/ScalableLux/commit/53b78f42bb0fb72400615aeb9545dcf1a635fe4f) fix: gha artifacts - ishland
[17cc1b4e](https://github.com/RelativityMC/ScalableLux/commit/17cc1b4e1d4c3174626d8f21ccfff39ba0c4f434) fix: GHA issues - ishland

[0.3.0-alpha.0.0+26.2] 0.3.0-alpha.0.0 devbuild for 26.2 by ishland on Oct 08, 2026

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This version is uploaded automatically by GitHub Actions.

Changelog:

[87f24376](https://github.com/RelativityMC/ScalableLux/commit/87f2437699cfa47f21c99c16d960649b48504c51) change: cleanups - ishland
[9a5f9cdb](https://github.com/RelativityMC/ScalableLux/commit/9a5f9cdb97663564821cf7f8d604783e8175781a) change: deprecate non-prefixed ExtendedChunk methods for removal - ishland
[058985c4](https://github.com/RelativityMC/ScalableLux/commit/058985c4d21318bc179fbd69610672b794be70bc) build: add publishing stuff - ishland
[624d9bce](https://github.com/RelativityMC/ScalableLux/commit/624d9bce308991903e89efd8d790a38d5ce227c9) build: 0.3.0-alpha.0 - ishland

[0.2.1+neoforge.729d9d3] 0.2.1+neoforge.729d9d3 by ishland on Oct 08, 2026

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ScalableLux 0.2.1 for Minecraft 26.2 is released**

Changelog:

Port to 26.2 (26.2-rc-1)

[0.2.1+fabric.2b08348] 0.2.1+fabric.2b08348 by ishland on Oct 08, 2026

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ScalableLux 0.2.1 for Minecraft 26.2 is released**

Changelog:

Port to 26.2 (26.2-rc-1)

[0.2.0+neoforge.cd0897f] 0.2.0+neoforge.cd0897f by ishland on Oct 08, 2026

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ScalableLux 0.2.0 for Minecraft 26.1 is released**

Changelog:

Port to 26.1 (26.1-rc-2)
Completely removed Starlight format support
Improved performance when loading and saving worlds
Reduced scheduling overhead with proper chunk system integration with C2ME

[0.2.0+fabric.2b63825] 0.2.0+fabric.2b63825 by ishland on Oct 08, 2026

Download

ScalableLux 0.2.0 for Minecraft 26.1 is released**

Changelog:

Port to 26.1 (26.1-rc-2)
Completely removed Starlight format support
Improved performance when loading and saving worlds
Reduced scheduling overhead with proper chunk system integration with C2ME

[0.1.6+neoforge.d31dbcf] 0.1.6+neoforge.d31dbcf by ishland on Oct 08, 2026

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ScalableLux 0.1.6 for Minecraft 1.21.9 is released**

Changelog:

Port to 1.21.9 (1.21.9-rc1)
change: set a size limit for SWMRNibbleArray pool

[0.1.6+fabric.c25518a] 0.1.6+fabric.c25518a by ishland on Oct 08, 2026

Download

ScalableLux 0.1.6 for Minecraft 1.21.9 is released**

Changelog:

Port to 1.21.9 (1.21.9-rc1)
change: set a size limit for SWMRNibbleArray pool

[0.1.0.1+neoforge.1cb1e91] 0.1.0.1+neoforge.1cb1e91 by ishland on Oct 08, 2026

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A few bugfixes for ScalableLux have been rolled out to multiple Minecraft versions.**

Changelog:

fix: properly implement setLightEnabled and lightOnInColumn (impacts 1.21.4+)

Fixes the issue where a lot of chunk is being wrongly culled in the end dimension

fix: properly call onChunkReadyToRender (impacts 1.21.4+)

Fixes the issue where only the current chunk section is rendered when first joining the world

fix: implement LevelLightEngine.getDebugSectionType (1.21.1-1.21.5)

Fixes compatibility for potential backports of voxy

[0.1.5.1+neoforge.f7c210f] 0.1.5.1+neoforge.f7c210f by ishland on Oct 08, 2026

Download

A few bugfixes for ScalableLux have been rolled out to multiple Minecraft versions.**

Changelog:

fix: properly implement setLightEnabled and lightOnInColumn (impacts 1.21.4+)

Fixes the issue where a lot of chunk is being wrongly culled in the end dimension

fix: properly call onChunkReadyToRender (impacts 1.21.4+)

Fixes the issue where only the current chunk section is rendered when first joining the world

fix: implement LevelLightEngine.getDebugSectionType (1.21.1-1.21.5)

Fixes compatibility for potential backports of voxy

[0.1.0.1+fabric.d0d58ab] 0.1.0.1+fabric.d0d58ab by ishland on Oct 08, 2026

Download

A few bugfixes for ScalableLux have been rolled out to multiple Minecraft versions.**

Changelog:

fix: properly implement setLightEnabled and lightOnInColumn (impacts 1.21.4+)

Fixes the issue where a lot of chunk is being wrongly culled in the end dimension

fix: properly call onChunkReadyToRender (impacts 1.21.4+)

Fixes the issue where only the current chunk section is rendered when first joining the world

fix: implement LevelLightEngine.getDebugSectionType (1.21.1-1.21.5)

Fixes compatibility for potential backports of voxy

[0.1.2+fabric.87468e8] 0.1.2+fabric.87468e8 by ishland on Oct 08, 2026

Download

A few bugfixes for ScalableLux have been rolled out to multiple Minecraft versions.**

Changelog:

fix: properly implement setLightEnabled and lightOnInColumn (impacts 1.21.4+)

Fixes the issue where a lot of chunk is being wrongly culled in the end dimension

fix: properly call onChunkReadyToRender (impacts 1.21.4+)

Fixes the issue where only the current chunk section is rendered when first joining the world

fix: implement LevelLightEngine.getDebugSectionType (1.21.1-1.21.5)

Fixes compatibility for potential backports of voxy

[0.1.3.1+fabric.ce1e005] 0.1.3.1+fabric.ce1e005 by ishland on Oct 08, 2026

Download

A few bugfixes for ScalableLux have been rolled out to multiple Minecraft versions.**

Changelog:

fix: properly implement setLightEnabled and lightOnInColumn (impacts 1.21.4+)

Fixes the issue where a lot of chunk is being wrongly culled in the end dimension

fix: properly call onChunkReadyToRender (impacts 1.21.4+)

Fixes the issue where only the current chunk section is rendered when first joining the world

fix: implement LevelLightEngine.getDebugSectionType (1.21.1-1.21.5)

Fixes compatibility for potential backports of voxy

ScalableLux

ScalableLux

Why does this fork exist?

What does this fork do?

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